I'm new to SAN storage so I was wondering if someone can assist me with a problem. I have a solaris 10 OS with 3 SAN devices attached. We are trying to troubleshoot performance so I was asked to get the WWN of each SAN disk and show what it's attached to via the SVM mount in the metastat output.
I can get what HBA controller it's attached to and the controller HBA by doing:
I just can't figure out how to get the WWN for that actual device.
I have tried searching google, but everything always points to getting the WWN of the HBA card. I'm beginning to think from an OS level it's not possible to get the WWN of the actual SAN disk. Can someone please confirm if you can or not and if you can please point me in a direction on how to obtain it.
Hi
I have a linux box attched to a SAN storage from EMC with RAID 5 .I understand that it has 3g cache howver a 20gb file creation takes too much time here are my results any ideas why
time dd if=/dev/zero of=disk.img bs=1048576 count=20000
20000+0 records in
20000+0 records out
997.59s... (2 Replies)
I have my application vendor looking at this but I want to do my own investigation.
I restored from mksysb and I see my vgs that contain my internal disks.
But I do not see my vgs that contain disks from the SAN. This scares me ..
{{ Ha, ha!! My AIX expert boss just told me I have nothing... (0 Replies)
Hi, I'm having a problem when attempting to define the OCR location for my 10g RAC setup on Solaris 10. I get the following error:
The specified shared raw partition /dev/did/rdsk/d1s0 may not have the correct permission. Verify that the partition is owned by Oracle user.
As per the Oracle10g... (15 Replies)
This may sound like an absolute rookie question, and it is.
I have been working on Migrating our HP and Solaris servers to the new EMC SAN and know the routines backwards.
Now we've suddenly got a new IBM server and I don't even know how to check if it is connected to the switch.
Can someone... (1 Reply)
Good morning to one and all :-) Thank god its Friday, as its bee na rubbish week for me !
So, a quick question. Disks ! Ive got a few local disks, and a few SAN disks used on my solaris server. Whats confusing me, and Im not sure if there's an issue at the SAN end, or my end, regarding the... (3 Replies)
Hello everybody,
I'm using the binary inqraid (Linux RHEL) in order to retrieve information about SAN disks. The questions are:
Given an LDEV, how do I know if the SAN disk related to this LDEV is being used by the OS? I mean, how can I demonstrate to "Storage department" that all disks of... (4 Replies)
HI, I have had an issue last night while trying to extend a filesystsem . chvg -g <vg> command cameback with an error
0516-1790 chvg: Failed bootinfo -s hdisk9.
Ensure the physical volume is available and try again.
0516-732 chvg: Unable to change volume group u01vg.
the VG has 1... (1 Reply)
Hello, I'm trying to get to the bottom of SAN disk errors we've been seeing.
Server is Sun Fire X4270 M2 running Solaris 10 8/11 u10 X86 since April 2012. SAN HBAs are SG-PCIE2FC-QF8-Z-Sun-branded Qlogic. SAN storage system is Hitachi VSP. We have 32 LUNs in use and another 8 LUNs not brought... (4 Replies)
Discussion started by: TKD
4 Replies
LEARN ABOUT HPUX
st_san_safe
st_san_safe(5) OBSOLETED st_san_safe(5)NAME
st_san_safe - determine whether access to tape device special files without the no-rewind-on-close option is allowed (OBSOLETED)
VALUES
Failsafe
Default
Allowed values
Recommended values
or
DESCRIPTION
Note: this tunable is obsoleted and has been renamed to beginning with release HP-UX 11i v3.
This tunable notifies the tape driver whether it should allow access to device special files without the no-rewind-on-close option. When
this tunable is on the tape driver will fail any open on a tape device special file without the no-rewind-on-close option (that is, or with
a status of
The tunable allows the safe sharing of tape devices in SAN tape backup solution configurations. The disabling of device special files
without no-rewind-on-close in a SAN tape backup solution configuration prevents the accidental sending of a rewind command on close from
HP-UX systems via standard tape commands like which would corrupt a backup in process.
Who Is Expected to Change This Tunable?
Anyone.
Restrictions on Changing
Changes to this tunable take effect immediately.
When Should the Tunable Be Turned On?
This tunable should be turned on if the system is going to be used in a SAN tape backup solution configuration.
What Are the Side Effects of Turning the Tunable On?
The tape driver will fail any open to a tape device special file that does not have the no-rewind-on-close option with a status of This
behavior prevents the usage of any tape device special file without the no-rewind-on-close option.
When Should the Tunable Be Turned Off?
This tunable should be turned off if the system is not part of a SAN tape backup solution configuration or the system utilizes will not
function unless it has access to device special files without the no-rewind-on-close option.
What Are the Side Effects of Turning the Tunable Off?
A rewind may be issued from this system accidentally on close possibly corrupting a backup being issued from another system on the SAN.
What Other Tunables Should Be Changed at the Same Time?
None.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by Hewlett-Packard.
SEE ALSO norewind_close_disabled(5), scsi_tape(7), scsimgr_estape(7).
Tunable Kernel Parameters st_san_safe(5)